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Date: Sun, 03 Jul 2005 08:08:51 GMT
From: Malcolm William Mason <mwm1(spam)nospamedu>
Subject: Re: Re: Re: Re: A/c compressor 1999 9-3


>That's probably a little excessive, though a really bad failure may make it >worthwhile. Normally this is only an issue in central A/C or heat pump >systems where a compressor burnout results in lots of nasty acidic gunk in >the hermetic system from the varnish burning off the motor windings. It's >not particularly easy to flush out one of these systems so they make special >cleanup filters to be installed after such an incident. What I will standby is : Clean up cap tube or orifice if present. Alternatively replace the thermal expansion valve if that is the metering device not a tube or orifice. I am leery of cleaning up TX valves. Remove old dryer and filter and replace. Retain receiver but be sure it is clean. Pump down as far as possible. Replace charge and use gauges or very accurate weighing method. Repeat with new dryer and recharge if you are a stickler. I feel it is cheap insurance. Refrigerant, high pressure and moisture can produce nasty products even in an "open drive" compressor After replacing the compressor, which is almost always the case, always add a filter. A new filter. The failing of failed compressor creates a lot of crud that you do not need fouling the replacement. I have seen sticklers who after a week or so will remove and reinstall another filter dryer pump down and recharge. This may be a "belt and suspenders" approach, but those who did it had plenty of automotive cooling experience. Malcolm

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